Affiliation: | 1. Division of Cardiology, Beth Israel Deaconess Medical Center, Boston, Massachusetts;2. Clinical Epidemiology Unit, Massachusetts General Hospital, Boston, Massachusetts;3. Division of Research, Kaiser Permanente Northern California, Oakland, California;4. Department of Epidemiology and Biostatistics, University of California, San Francisco, San Francisco, California;5. Division of Hospital Medicine, University of California, San Francisco, San Francisco, California |